October 2016
Intermediate to advanced
452 pages
9h 47m
English
Content preview from Unreal Engine 4 Scripting with C++ Cookbook
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Reflectance dependent on the viewing angle
The tendency of the reflectance of a material to depend on the viewing angle is called the Fresnel effect. A material may be more specular from a grazing angle than from a head-on angle.
Note
The Fresnel effect has magnitude at a grazing angle. This water material seen in the preceding screenshot has high specularity and opacity at a grazing angle due to use of the Fresnel effect.
UE4 has a specially built-in capability to account for this. We'll construct a water shader that has view-angle dependence for translucency to give an example of how to use the Fresnel effect realistically.
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